← Heartwood Library

Block #5

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block#5 of 39 (chain of 40 blocks)
sealed at2026-09-05T15:46:27.747Z
kindarticle (open era)
contentBattery Storage Basics
signed byunsigned (open era)
block hashfbecf49d40817e7e541ed1299b30a67070e0e8d23dbc68d427d768ac61c86568
previous hashb50e7746a90cc01fe27b8b0a14308d3faf284d34ac31882fee13e4be1e34aba2
public anchorconfirmed in Bitcoin block 966087, 966092, 966114 ✓ — statement · proof (.ots) · verify it yourself
This is the library’s own record; it lives on no third-party blockchain, by sealed covenant (no token, ever).
Verify it without trusting this page: download the raw chain and recompute every hash, or check the signed tip at /api/tip.
The public anchor stamps exactly (index, hash, sealedAt, and this page’s URL) into Bitcoin via OpenTimestamps — verify the proof with the open ots tool; no trust in this server needed. All anchors: /api/anchors.